Long-stroke walking-beam attachment



. T E. BRALY Aug. 19, 1930.

LONG STROKE WALKING BEAM ATTACHMENT Filed Aug. 16, 1926 j V/g VZOr 7726772051575 fa 7 Patented Aug. 19, 1930 UNITED STATES THOMAS E. IBBALY, OF LONG BEACH, CALIFORNIA LONG-STROKE WALKING-BEAM ATTACHMENT Application filed August 16, 1926. Serial No. 129,340.

As may be inferred from the above title, this invention relates particularly to'means for increasing the vertical reciprocation of a pump rod, or the like, as produced by cyclical oscillation of a walking beamsuch as is commonly used in the pumping of deep wells.

It is well known that, in view of the crookedness of well holes, the elasticity of pump rods and the character of the fluid pumped, it is often difiicult or practically impossible to utilize, at great depths, pumping organizations which are entirely adequate in the case of more shallow wells; andit is accordingly an object of my invention to provide 1 means, suitable for installation in conjunction with or' as a'supplement to ordinary pumping rigs, for substantially increasing the length of a pumping stroke, suitably to the use of the mentioned equipment in deep wells; and preferred embodiments of my invention may comprise levers supported upon fixed pivots substantially parallel with walking beams and movable thereby,-one end of each of said levers being supported upon a ri id bracket or post,the opposite. ends there- 0 being arcuate in form, and intermediate means being provided for the transmission of motion from'a walking beam thereto.

Other objects of my invention, including I the provision of a long stroke attachment in which a relative slowing at the respective ends of a reciprocating. or oscillatory move-" ment is incidentally provided for, and in which play-permitting means such as pinand-slot connections are provided either at the points of support of the mentioned levers or at the point of connection of said levers with walking beams, a pair oflike levers being preferably disposed on opposite sides of 0 a walking beam and interconnected thereabove insuch manner as to provide an equalizin yoke for the removable attachment of a flexible element used directly or indirectly in the reciprocationof a pump rod, may be best appreciated from the following description'of an illustrative embodiment of my invention, taken in connection with the accompanying drawings, in which Flg. 1 may be referred to as an elevatlonal general view, with parts broken away.

Fig. 2 is a partial top plan view, taken substantially as indicated by the arrow 2 of Fig 1.

- ig. 3 is a partial end elevational view, taken substantially as indicated by the arrow3of Fig.1. 0 Figs. 4 and 5 are respectively sectional detailed views, taken substantiall as indicated by the lines 4:4 and 55 of ig. 1.

Referring to th details of that specific embodiment of my invention chosen for purposes ofillustration, 11 ma be a so-called bull post supporting'a walklng beam 12, reciprocatory moyement being imparted to said walking beam in any usual or preferred manner, as by an adjustable pitman 13 secured thereto and to a crank 14 upon a shaft 15 provided with a bull wheel 16, or the like,and the mentioned parts may be associated in any desired way with parts of a main frame comprising any desired uprights 17 and/or horizontal beams 18, The latter are shown as supporting a floor 19, throu h which may extend, or upon which .ma e supported, pump parts 0 any desired 0 aracter, the reciprocation of the walking beam 12 being utilized directly or indirectly to im- .part -movement to, for example, a so-called polish rod 20, which may be connected with a string of sucker rod for the operation of a reciprocatory pump in a known manner.

Coming now to the strictl novel features of my invention, instead of 'connecting the polish rod 20, or its equivalent, more directly with what I may term the pulling end 21 of a 35 walking beam, I provide a fixed pivot or pivots 22 (as upon rigid brackets or posts 23) for an intermediate lever or levers 24,-a pair r of like levers being shown as disposed upon opposite sides of said walking beam and as connected therewith by pin-and-slot connections, indicated at 25.

The levers 24 may respectively comprise arcuate sections 26, whose curvature may center in pivots 22,--assuming these to be the fixed pivots; and the upper ends of these arcuate sections may be rigidly interconnected by means such as a grooved or arch-like yoke member 27 ,the sections 26 and the yoke 27 being alike provided with channels suitable 1 for the reciprocation and releasable retention of a cable 28, or the like. Whether or not the mentioned grooves permit a longitudinal slippage of the cable, it may be at- I tached inany usual or preferred Way (as by ting 31 to the walking beam 12 (pivoted at 32) may optionallybe of such length as to permlt of some variation in the ratio of the shorter arm of the lever24 to the longer arm thereof, by, for example, a change in the position of the plate carrying coaxial pivots 22, and that, at mid-stroke, the pivots 22, 25 and 32 may advantageously lie in a common horizontal plane.

From the foregoing, it will be obvious that, dependent upon the length of the longer arm of the lever 24, as compared with the shorter arm thereof, and dependent also upon the dlstance from the main pivot 32 of the walk mg beam 12 at which the pivots 22 are se- "cured, and dependent also upon the point of insertion of wrist pin 33 on crank arm 34 (wlth a consistent adjustment of the turnbuckle 13) variations in the length of a pumpmg stroke may be produced; and also that, the distance between the pivots 22 and 25 being least when the walking beam 12 occuples a substantially horizontal position, the

. motion imparted to a polish rod 20, or the like, by means of the general character descrlbed may be appreciably slowed at the ends ofstrokes produced by means of the general character described, this slowing'bein g favorable to a reliable operation of the valves of the pump operated thereby.

' Although I have herein described a single complete embodiment "of my invention, it

should be understood not only that various features thereof might be independently used but also that numerous modifications mlght be made by those skilled in the art to whlchthis case relates, all without the slight est departure from the spirit and scope of this invention, as the same is indicated above and in the following claims.

I claim as my invention:

1. In a long-stroke organization for a dee well pump operated by means comprising a walking beam having a fulcrum intermediate of 1ts ends pivoted on a bull-post: an intermedla te lever having a fulcrum at one end thereof and movable in a plane substantially parallel with said walking beam, said lever being pivoted on a fixed support and provided with flexible means for connecting a sucker rod therewith; and play-permitting means for transmitting motion from said walking beam to said lever.

2. In a long-stroke organization for a deep well pump operated by means comprising a walking beam pivoted on a bullpost: an intermediate lever .movable in a plane substantially parallel with said Walking beam, said lever being pivoted on "a fixed support and provided with flexible means for connecting a sucker rod therewith; and play-permitting means for transmitting motion from said walking beam to said lever, said last mentioned means comprising a. pin-and-slot connection between said beam and said lever.

3. In a long-stroke organization for a deep well pump operated by means comprising a walking beam pivoted on a bull-post: an 1ntermediate lever movable in a plane substantially parallel with said walking beam, said lever being pivoted on a fixed support and provided with means for connecting a sucker rod therewith; and play-permitting means for transmitting motion from said walking beam to said lever,a pair of said intermediate levers being disposed on opposite sides of said walking beam.

4. In a long-stroke organization for a deep well pump operated by means comprising a walking beam pivoted on a bull-post: an intermediate lever movable in a plane substantially parallel with said walking beam,'said lever being pivoted on a fixed support and provided with flexible means for connecting a sucker rod therewith; and play-permitting means for transmitting motion from said walking beam to said lever, said last-mentioned means being positioned between said fixed support and said connecting means.

5. In a long-stroke organization for a deep well pump operated by means comprising a walking beam pivoted on abull post; an intermediate lever movable in a plane substantially parallel withsaid walking beam, said lever being pivoted on a fixed support in substantially the same horizontal plane with the pivot point of said walking beam, and pro-' vided with means forconnecting a sucker rod therewith; and play permitting means for transmitting motion from said walking beam to said lever.

.6. In a long-stroke organization for a deep well pump operated by means comprising a walking beam pivoted on a bull post; an in termediate lever movable in a plane substantially parallel with said walking beam, said lever being pivoted on a fixed support in substantially the same horizontal plane with the pivot point of said walking beam, and provided with means for connecting a sucker rod therewith; and play permitting means for transmitting motion from said walking beam to saidlever, said play permitting means comprising a pin which at midstrokes of said lever, lies substantially in the horizontal plane containing the fixed pivot points of said Walking beam and said lever.

7 In a long stroke organization for a deep well pump operated by means comprising a walking beam pivoted intermediate of its ends, an intermediate lever pivoted at one end on a fixed support and provided at the opposite end with an arcuate member, said intermediate lever being arranged to operate in a plane substantially parallel with said walking beam, flexible means for connecting said arcuate member with a sucker rod, and play permitting means for transmittin motion from said walking beam ,to said ever. In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 3rd day of August, 1926. v

THOMAS E. BRALY. 

